[Code of Federal Regulations]
[Title 30, Volume 1]
[Revised as of July 1, 2002]
From the U.S. Government Printing Office via GPO Access
[CITE: 30CFR77.302]

[Page 612]
 
                       TITLE 30--MINERAL RESOURCES
 
  CHAPTER I--MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR
 
PART 77--MANDATORY SAFETY STANDARDS, SURFACE COAL MINES AND SURFACE WORK AREAS OF UNDERGROUND COAL MINES--Table of Contents
 
                        Subpart D--Thermal Dryers
 
Sec. 77.302  Bypass stacks.

    Thermal dryer systems shall include a bypass stack, relief stack or 
individual discharge stack provided with automatic venting which will 
permit gases from the dryer heating unit to bypass the heating chamber 
and vent to the outside atmosphere during any shutdown operation.